I have to admit that I'm not one to read stories on assassins but I've been reading a few of them lately and I have to say that I kinda like this one. Now that doesn't mean that this manga is a masterpiece or anything but this manga is more like one of my guilty pleasures like Dragon Knights.
The story is about a woman named Oyuki who is on a path of vengeance towards the ones who raped her mother and killed her family. Oyuki's skills as an assassin are unbelievable. She uses her resources to find the ones she's after and then uses her assassin skills to kill them. While her skills are pretty badass, her character is pretty bland. She's not really interesting. Seeing as this is a manga about an assassin with no emotion there's no surprise that the main character has no outward emotional responses except when she is with people that she gets to know well like her aunt and this gentleman who she sees as her father figure. As sweet as that is, there is not much interaction between these characters and so it doesn't seem believable that they would have a relationship.
The story is okay but not really that complex but it's interesting enough. The story follows Yuki as she goes to find the ones her mother wants revenge on and sets out to kill them. It's not that interesting but when she goes after the people she's been training to kill, it gets intense and it does give good action scenes.
A bit of warning though. It is a josei yuri manga so there are some sexual content between women. It's not porn but the scenes are still there so if that makes you uncomfortable then don't read.
There is also not much else to talk about because there are only four volumes to this manga. So you guys have an awesome day. :)